Night latch



Patented Sept. 14, 1926.

UNITED .STATES ',PATENT'OFFICl-lj' Ueo r. ooLoivryBr-.ANDJOSEPH.ANANIfa or MeKEnsroRT, rnnNsYLvAivra p NIGHT LATCH.

Application filed February same to its releasing position.

u A further object of the invention is to provide a lock for doors wherein a latch bolt having the usual beveled nose is of increased length to present av flat side face of the latch bolt rearwardly of the beveled nose ina position to exten-d across the meeting edges of a door and door frameand also span the meeting edges of the lock and keeper casings.

In locks of this general type, and more f specifically embodying the improvements abovev referred to, the latch bolt is usually constructed of a relatively soft material, such as brass and to eliminate the possibility of a person Vsinkingv an implement into the latch bolt for purposes of sliding the same to itsreleasing position, the invention probolt, and

vides for the mounting of 4a steel plate on the side face of the latch bolt and spanning the space between theV doorframe and door,

W'ith the above general objects in view and others that will becomeYa-pparent as the nature of the invention is better understood, vthe same consistsof the novel form,com bination andjarrangement of parts hereinafter-more fully'described, shown in the ac-y l u adjacentthe door frame 2 as shown in Fig.

companying drawing and claimed.

In the drawing,-y wherein like reference 4characters designate v corresponding parts throughout thesame, i

Figure l is a top plan view of a lock constructed in accordancewith the present invention, the ysame being illustrated as mounted upon a door and door frame.

Figure 2 is a side elevational view, partly broken away and shown in section illustrating the increased lengthk ef the latch bolt and the steel wearing plate inserted in the face of the latch bolt disposed toward the outer side ofthe door and casing,

Figure 3 is a perspective view ofthe latch Figure 4 is a perspective viewl of the keeper casing for the latch bolt. y

In the ordinary construction `of a lock embodying a latch bolt, the inner edge of the 19, 1925. serial No. 10,403.

tapered nose of the latch bolt terminates at a point substantially flush withtheforward edge of the look casing so that the tapered nose of the latch bolt alone projects from the latch casinginto thekeeper casing, for

the latchbolt an-d withl the .tapered side 'of i the latch bolt nose disposedftowardr the outer side of a door and doorvcasingfwith the result that a person inserting a thin imple-` `ment lbetween the edge of the door-and 'casing forl engagement withthe tapered side ofthe latch bolt nose mayrshift the latch bolt to its releasing position; v'Io prevent unauthorized tampering with the latch bolt,

the same as disclosed in this application is of increased `length so thatl a flat side ofthe latch .bolt adjacent4 the *beveled nose .extends outwardly of the lock casing and spans the" space between the lock and keepercasings and theflatch bolt being usually constructed of relatively soft' material `such as brass, a steel plate is inserted in the exposed side thereof so that yan implement `cannot be `sunk into the latch bolt for sliding thesame. To compensate forvthevincreased length of the latch bolt so that thesame will be retracted duringthe closing movement of theidoor v when the latchbolt engages the. keeper casing,"the latter is cut awayto providea clearance for the flat side o'flthe latch` bolt and to present the beveled nos-e for engagement 2.\ The lock casing 3 of ordinary construction is secured to the'door l and the keeper' casing 4 for the latch bolt is secured to lthe door frame 2.

The latch bolt 5 shown in detail in Fig. 3 is of the usual spring pressed type with the forward beveled nose 6 and is of increased length as shown inFig. 2 for spanningzthe space betweenvv the meeting walls 7 and 8 ofl the lock and keeper casings with the' beveled nose 6 of the latch bolt entirely housed within the keeper casing 4e and spaced from the lock casing 3. rlhe beveled nose o f the latch bolt from the points ttand Z9- is entirely housed within the keeper casing and the side 9 of the latch 'b olt betweenthe points 0aand -0- span the space between the walls 7 and 8 of the lock and keepler casings.

l/Vit'h the latch 'bolt v5 in the position shownin FigfQ, a person forcing an implement between the door l and casing- 2 and walls 7 and 8 of the lock .and keeper casings presents the implement for contact with the flat side 9 of the latch bolt and as the beveled nose 6 of the latch bolt from the points D-a to -7J- is entirely removed from said space, unauthorized sliding movement of the latch bolt to its releasing position is prevented. The latch bolt being usually constructed of relatively soft material, such as brass or the like, it is important that the same be strengthened or reinforced, andto accomplish this result a ysteel plate l0 is countersunk within the flat side 9 of the latch bolt, as by a dove-tailed interlockingconnection and may be wedgingly or otherwise retained therein as at l1. It will, therefore, be seen that the relatively hard steel plate 10 spans the space between the walls 7 and 8 of the lock and keeper 'casings and unauthorized sliding movement of the latch bolt is pre,- vented.

To compensate for the increased length lof lthe latch bolt andpermit the usual slid-v ing movement thereof to its retracted position vduring closing movement of the door l, the keeper casing 4t having the usual latch bolt receiving opening 12 in the forward wall S thereof is cutaway at the upper end as at'13 with the rear wall of the cutaway portion provided with an arcuate'flange lll,

while thel top wall of the lock casing 3 c-arries a forwardly projecting flange l5 to be moved into engagement with the flange la to present a neat appearance atthe inner side ofthe lock. When the door is moved to its closed position the flat face 9 of the latch bolt adjacent thebeveled nose 6 will pass thru the cutaway portion 13 of the keeper casing and the rear edge V--aof the latch bolt nose. 6 contacts the arcuate flange lato cause the bolt to be retracted into the lock casing against spring tension thereof yand then be automatically projected into the keeper when the door l is fully closed.

While there is herein shown and described the preferred embodiment `of the present invention, it is nevertheless to `be understood. that'minor changes may be made therein without departing` from the spirit and scope of the invention as claimed.

lVhat is claimed as new is 1.111 a lock, lock and keeper casings, a tensioned latch belt slidable from the lock casing tothe keeper casingysaid latch bolt having a beveled nose with the rear endof the nose located inthe keeper casing and located beyond the space betweenl the lock and keeper .casings, and a steel 4insert set into the flat face of the latch bolt extending across the space between the two casings.

2. In a lock, lock and keeper casings, 2. tensioned latch belt slidable fromV the lock casing to thekeeper easing, said latch bolt having a beveled nose with the rear endof thenose located in the keeper casing kand located beyondthe space between the lock and keeper easings with a flat side of the latch bolt spanning the space between the casing, and a steel insert set intothe flat face of the latch bolt extending across the space between the two casings.

In a lock7 lock and keeper casings, a

tensioned latch bolt slidable from the lock having a beveledk nose with the rear end of the nose located inthe keeper casing and located beyond the 'space betweenthe lock and keeper casings with ya flat side of the latch bolt spanning the space betweenthe casing; a steel insert set into the flatl face of the latch bolt extending across the space between. the two 'casin'gs, vand the keeper casing having a cutaway portion providing a clearance for Athe extended latch bolt and an arcuate flange on the wall of the cutaway portion to engage the nose of the bolt for automatic retraction thereof.

In testimony whereof we affix our signa- 

